LU-5814 llite: add cl_object_maxbytes()

LU-5814 llite: add cl_object_maxbytes()

Add cl_object_maxbytes() to return the maximum supported size of a
cl_object. Remove the lli_maxbytes member from struct
ll_inode_info. Change the lsm_maxbytes member of struct lov_stripe_md
from __u64 to loff_t. Correct the computation of lsm_maxbytes in the
released layout case.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Signed-off-by: Jinshan Xiong <jinshan.xiong@intel.com>
Change-Id: Idfa6d38ed1192d562f7d99bf21b924fd711f77dc
Reviewed-on: http://review.whamcloud.com/13694
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>